Grinder.



W. H. ARCHBR. GRINDEE. APPLIOATIOK I'ILBD DEO.17. 1909.

. 969,741 Patented Sept. 6, 1910.

(314 U e ::two

MM #MM WILLIAM H. ARCHER, OF TOLEDO, OHIO.

GRINDER.

Specification of Letters Patent.

Patented Sept. 6, 1910.

Application filed December 17, 1909. Serial NO. 533,668.

To all whom it may concem:

Be it known that I, lVILLIAM I-I. ARCHER, ar citizen of the United States, residing at Toledo, Lucas county, Ohio, have invented new and useful Grinders, of which the following is a Specification.

This invention relates to a die or working element having an Operating edge, and the mounting for the element.

This invention has utility when adapted for use in mills of the centrifugal type, wherein it is simple in form and capable of quick and economical adjustment.

Referring to the drawings: Figure 1 is a perspective view showing an embodiment of the invention in a centrif'ugal mill such as may be used for pulverizing purposes by manufacturing pharmacists; Fig. 2 is a detail view in elevation, showing the working element or beater and its mounting as embodied in the eentrifugal mill of Fig. l; Fig. 8 is a fragmentary view of one of the mounting disks Or carriers; Fig. 4: is a similar fragmentary view of the other mounting disk; and Fi 5 is a erspective view of One of the working elements or hexahedral beaters.

The driving belt 1, through the pulley 2 actuates the grinder shaft 3 of the mill. This shaft 3 is carried in the bearings 4 On the base 5. The shaft 3 has an overhang beyond one of the bearings t, which overhan portion of the shaft 3 is provided with a co llar 6, fixed on the shaft. Against this collar 6 abuts the sti'lfening collar 7 to reinforce the mounting member or Spider 8. This member or Carrier is provided with radially disposed integ'al lugs or arms 9, alternately on opposite faces of the disk, resulting in staggered mounting of the working elements 10, carried by this rotatable Carrier Or mounting member 8.

A second reinforcing collar 11 is disposed between the Carrier 8 and the Carrier 12, which second Carrier is held by a third reinforcing collar 13 looked in position by the nuts lt. Of the plurality of beater Carrier plates, that one to which the material is first fed is provided with openings 15, to permit freer travel of the material, as well as allowing for more Circulation.

Material fed into the hopper 16 is delivered to the Chamber having the armored lining 17, in the various mills usually roughened or perforate. The plurality of working elements 10, rotating at high speed in this Chamber have slight clearance from the walls of this Chamber, so besides violently throwing the material by centrifugal action against the Chamber walls, these working elements are effective at their forward operating edges to contact the material lodging against the Chamber walls and by this action contribute directly to disintegration which the centrifugal throwing brings about indirectly. The staggering of the dies is such as to increase the effective field of the working elements, while the overlapping of the lines of travel of these elements intermediate the disks, renders their action continuous throughout the length of the Chamber in which they act.

In operation, the forward outer edge of the working element is worn more or less rapidly, depending upon the character of material being ground or powdered. For rapid and effioient operation, it is desirable to keep the Operating edges of the working elements Sharp. Adjustments for accomplishing this end may be quickly made by the mill operator at any time with the structure of this disclosure, for the working elements are each provided with eentral openings 18 for the holding means, herein shown as tangentially disposed bolts 19, held by nuts 20 against the forward faces of the arms 9. As s'o mounted, in normal forward ope'ation, the action of the material tends to more firmly seat the working element against the arm, instead of working it loose. For adjnstment. the nut 20 is loosened up to 'permit rotation from say Operating edge 21 to the meeting angularly disposed edge 22. As edge 22 becomes worn, further adjustments may be made to edges 23, 24, to complete the set on one side of the element, and then the element may be reversed to use the similar opposite set of operating edges 25, 26, &0. As shown, the One die or element may serve for eight adjustments, and is then readily replaced. The

periphery of the disk serves as a shoulder for the beater, while the simple polyhedral form of this element is a feature of simplieity, making it impossible to mount it wrong, while it is Cheap and substantial.

What is claimed and it is desired to secure by Letters Patent is:

The combination in a centrifugal mill grinder, with a disk having integral therewith lugs alternately disposed on opposite sides of the disk and extending beyond the periphery of thedisk to formbeyond the disk faces, for adjusting each edge of the eleperiphei'y holding faces lying in aXially ex- Inent into Operative position. 10 tending planes, of uniforni thickness working In testilnony whereof I aflix my signature elements lnounted against said holding faces in the presence of tWO Witnesses. and looked from rotation by the disk pe- YV. H. ARCHER. I'iphery, and adjustable means centrally enlVitnesses:

gaging the elements to detachably maintain C. H. RAUCH,

the eleinents in position against the holding GEO. E. KIRK. 

